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/*
This file is part of GNUnet.
Copyright (C) 2012, 2013 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
package org.gnunet.util;
import org.gnunet.util.crypto.EcdhePrivateKey;
import org.gnunet.util.crypto.EcdhePublicKey;
import org.gnunet.util.crypto.Ed25519;
import org.junit.Assert;
import org.junit.Test;
/**
* Test ECDHE.
*/
public class EcdheTest {
/**
* Test whether the key is correctly restored when serializing it.
*/
@Test
public void test_compress() {
EcdhePrivateKey privKey1 = EcdhePrivateKey.createRandom();
EcdhePublicKey pubKey1 = privKey1.getPublicKey();
EcdhePublicKey pubKey2 = new EcdhePublicKey(pubKey1.asPoint());
Assert.assertArrayEquals(pubKey1.y, pubKey2.y);
}
/**
* Test a single ecdh operation.
*/
@Test
public void test_simple() {
EcdhePrivateKey privKey1 = EcdhePrivateKey.createRandom();
EcdhePrivateKey privKey2 = EcdhePrivateKey.createRandom();
EcdhePublicKey pubKey1 = privKey1.getPublicKey();
EcdhePublicKey pubKey2 = privKey2.getPublicKey();
System.out.println("private key: " + Strings.dataToString(privKey1.d));
System.out.println("private key coeff:" + Ed25519.decodeScalar(privKey1.d));
System.out.println("public key: " + pubKey1);
System.out.println("pubk as point: " + Ed25519.decode(pubKey1.y));
HashCode h1 = privKey1.ecdh(pubKey2);
HashCode h2 = privKey2.ecdh(pubKey1);
Assert.assertArrayEquals(h1.data, h2.data);
}
/**
* Test with values from the C GNUnet implementation.
* Generated with 'gnunet-ecc -E'
*/
@Test
public void test_gnunet_values() {
EcdhePrivateKey privKey1 = new EcdhePrivateKey();
privKey1.d = new byte[32];
EcdhePrivateKey privKey2 = new EcdhePrivateKey();
privKey2.d = new byte[32];
Strings.stringToData("A46TL3L8CF7R3BPPQDE8LJS999NQ58HD43DV11MPFI2B5JNJMM40", privKey1.d);
Strings.stringToData("B60MFOBFKCVT0IVFDI800MH345FG372UJ4T7GEMNMO72O64G0D00", privKey2.d);
EcdhePublicKey pubKey1 = privKey1.getPublicKey();
EcdhePublicKey pubKey2 = privKey2.getPublicKey();
Assert.assertEquals("JLU00RUGNB04APG6I9RKVT1CJLB16U8T7G130CC2IV4O3LJG5K40", pubKey1.toString());
Assert.assertEquals("G9TDOQVP3CFA2K5Q7PSS8Q935FVEHAF3C08JPV1H3MPDK1ESLM6G", pubKey2.toString());
HashCode h1 = privKey1.ecdh(pubKey2);
HashCode h2 = privKey2.ecdh(pubKey1);
Assert.assertEquals(h1, h2);
byte[] gnunet_data = new byte[64];
boolean success = Strings.stringToData(
"R9A80A2VU4R0IL3NT4FBIMFRCGVP72DQODHTQQ1SGR65I4PMF1" +
"6C3ELIF2RSB9L8H0KLOUU795IM5L0CLCISI607B5P1QE8HRAPA56O",
gnunet_data);
Assert.assertTrue(success);
Assert.assertArrayEquals(gnunet_data, h1.data);
}
}
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